Difference between revisions of "Video for Linux"
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==Test== | ==Test== | ||
| + | ==Vivi driver== | ||
* V4L comes with a test driver called ''vivi'' that can be used to test your V4L applications: | * V4L comes with a test driver called ''vivi'' that can be used to test your V4L applications: | ||
| + | <pre class="config"> | ||
| + | <M> Virtual Video Driver | ||
| + | </pre> | ||
<pre class="apf"> | <pre class="apf"> | ||
# modprobe vivi | # modprobe vivi | ||
| Line 15: | Line 19: | ||
</pre> | </pre> | ||
| − | * in ''target/demos/camera/'' you will find a test application (derived from http://linuxtv.org/downloads/video4linux/API/V4L2_API/v4l2spec/capture.c) | + | ===Capture=== |
| + | * in ''target/demos/camera/'' you will find a test application ''capture'' (derived from http://linuxtv.org/downloads/video4linux/API/V4L2_API/v4l2spec/capture.c) | ||
| + | * to compile it: | ||
| + | <pre class="host"> | ||
| + | $ make shell_env | ||
| + | $ source armadeus_env.sh | ||
| + | $ cd target/demos/camera/capture/ | ||
| + | $ make CC=$ARMADEUS_TOOLCHAIN_PATH/arm-linux-gcc | ||
| + | </pre> | ||
| + | * you can also compile it for your Host if needed: | ||
| + | <pre class="host"> | ||
| + | $ cd target/demos/camera/capture/ | ||
| + | $ make clean | ||
| + | $ make | ||
| + | </pre> | ||
| + | * to use it, copy ''capture'' executable (ARM one) to your board and then launch (here for example with a 800x480 LCD): | ||
| + | <pre class="apf"> | ||
| + | # ./capture --width 800 --height 480 --camwidth 640 --camheight 480 | ||
| + | </pre> | ||
==Links== | ==Links== | ||
* [http://www.linuxtv.org/wiki/index.php/Main_Page V4L-DVB Wiki] | * [http://www.linuxtv.org/wiki/index.php/Main_Page V4L-DVB Wiki] | ||
Revision as of 14:52, 21 April 2010
Page under construction...
Informations on this page are not guaranteed !!
Extract from V4L-DVB wiki: The V4L API is essentially a kernel interface for analog video capture and output drivers, and is applicable to most video streams that are not related to DVB devices ... or graphics cards -- though, the V4L API also entails a few oddities such as analog radio and RDS services. Examples of devices which fall within the scope of V4L are, amongst others, webcams, MPEG encoders/decoders, digital video streamers, analog TV tuners and video capture devices.
Contents
[hide]Installation
V4L core drivers are by default installed on APF27 configurations. APF9328 is currently not able to handle V4L compatible image capture streams.
Test
Vivi driver
- V4L comes with a test driver called vivi that can be used to test your V4L applications:
<M> Virtual Video Driver
# modprobe vivi Linux video capture interface: v2.00 vivi: V4L2 device registered as /dev/video0 Video Technology Magazine Virtual Video Capture Board ver 0.5.0 successfully loaded.
Capture
- in target/demos/camera/ you will find a test application capture (derived from http://linuxtv.org/downloads/video4linux/API/V4L2_API/v4l2spec/capture.c)
- to compile it:
$ make shell_env $ source armadeus_env.sh $ cd target/demos/camera/capture/ $ make CC=$ARMADEUS_TOOLCHAIN_PATH/arm-linux-gcc
- you can also compile it for your Host if needed:
$ cd target/demos/camera/capture/ $ make clean $ make
- to use it, copy capture executable (ARM one) to your board and then launch (here for example with a 800x480 LCD):
# ./capture --width 800 --height 480 --camwidth 640 --camheight 480
